from datetime import date

import pytest
from PySide6.QtCore import QCoreApplication

from study_dashboard.view_models import MainViewModel
from study_dashboard.services.models import (
    AppointmentRecord,
    ExamRecord,
    ModuleRecord,
)
from study_dashboard.services.repository import StudyRepository


class FakeRepository(StudyRepository):
    def __init__(self):
        self.modules = [
            ModuleRecord(
                module_id="DEMO-1",
                title="Demo Modul",
                credit_points=5,
                status="In Bearbeitung",
                progress_percent=60,
            )
        ]
        self.exams = [
            ExamRecord(
                exam_id="EXAM-1",
                module_id="DEMO-1",
                title="Demo Klausur",
                exam_date=date(2025, 12, 31),
                status="Geplant",
            )
        ]
        self.appointments = [
            AppointmentRecord(
                appointment_id="APPT-1",
                title="Mentoring",
                start_date=date(2025, 11, 30),
                description="Mock Termin",
            )
        ]

    def list_modules(self):
        return list(self.modules)

    def list_upcoming_exams(self, limit: int = 5):
        return list(self.exams)[:limit]

    def list_upcoming_appointments(self, limit: int = 5):
        return list(self.appointments)[:limit]


@pytest.fixture(scope="module", autouse=True)
def qt_core_app():
    app = QCoreApplication.instance()
    if app is None:
        app = QCoreApplication([])
    yield app


def _connect_collectors(view_model):
    payloads = {"modules": [], "exams": [], "appointments": []}

    view_model.modules_changed.connect(
        lambda payload, key="modules": payloads[key].append(payload)
    )
    view_model.exams_changed.connect(
        lambda payload, key="exams": payloads[key].append(payload)
    )
    view_model.appointments_changed.connect(
        lambda payload, key="appointments": payloads[key].append(payload)
    )

    return payloads


def test_view_model_emits_structured_lists():
    repo = FakeRepository()
    view_model = MainViewModel(repo)
    captured = _connect_collectors(view_model)

    view_model.load()

    modules_payload = captured["modules"][-1]
    exams_payload = captured["exams"][-1]
    appointments_payload = captured["appointments"][-1]

    assert modules_payload[0]["module_id"] == "DEMO-1"
    assert modules_payload[0]["progress"] == 60
    assert exams_payload[0]["date"] == "31.12.2025"
    assert appointments_payload[0]["title"] == "Mentoring"


def test_refresh_emits_latest_snapshot():
    repo = FakeRepository()
    view_model = MainViewModel(repo)
    modules_payloads = []
    view_model.modules_changed.connect(modules_payloads.append)

    view_model.load()

    repo.modules = [
        ModuleRecord(
            module_id="DEMO-2",
            title="Neues Modul",
            credit_points=10,
            status="Fast fertig",
            progress_percent=90,
        )
    ]

    view_model.refresh()

    latest_snapshot = modules_payloads[-1]
    assert latest_snapshot[0]["module_id"] == "DEMO-2"
    assert latest_snapshot[0]["progress"] == 90